A 16-ch module for thermal neutron detection using ZnS:6LiF scintillator with embedded WLS fibers coupled to SiPMs and its dedicated readout electronics

Mosset, J.-B.; Stoykov, A.; Greuter, U.; Громов, А. И.; Hildebrandt, M.; Panzner, Tobias; Schlumpf, N.

doi:10.1016/j.nima.2016.05.002

Cited by 15 publications

(10 citation statements)

References 5 publications

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“…The Heimdal instrument team favours the use of scintillator technology for the neutron diffraction detectors, as PSI, one of the co-proposing partner laboratories, has already extensive expertise in the design and construction of scintillator detectors and associated electronics for neutron scattering applications [42,45,43]. One of the options considered for the Heimdal powder diffraction detector is a scintillator module based on an unit already available as a prototype designed for the POLDI instrument at the SINQ laboratory in Switzerland [86].…”

Section: The Heimdal Diffraction Detectorsmentioning

confidence: 99%

“…The intense efforts carried out over the last years into increasing the performance of scintillatorbased detectors in terms of efficiency and counting rate capability showed positive results from the perspective of operation under the intense neutron fluxes expected at spallation neutron sources. The combined neutron imaging and neutron diffraction beamline IMAT, currently under construction at the ISIS facility [14], and the POLDI diffractometer operational at the Swiss spallation source SINQ at PSI [42,43,45], are examples of instruments that will be populated with scintillator modules combining the latest achievements in the field of photosensors or signal readout. WISH (ISIS), NOMAD (SNS), TAIKAN and SuperHRPD (J-PARC) are examples of diffractometers operated with hundreds of 3 He-filled position-sensitive tubes surrounding the sample [8,10,46,47,48].…”

Section: Introductionmentioning

confidence: 99%

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Neutron detectors for the ESS diffractometers

et al. 2017

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The ambitious instrument suite for the future European Spallation Source whose civil construction started recently in Lund, Sweden, demands a set of diverse and challenging requirements for the neutron detectors. For instance, the unprecedented high flux expected on the samples to be investigated in neutron diffraction or reflectometry experiments requires detectors that can handle high counting rates, while the investigation of sub-millimeter protein crystals will only be possible with large-area detectors that can achieve a position resolution as low as 200 µm. This has motivated an extensive research and development campaign to advance the state-of-the-art detector and to find new technologies that can reach maturity by the time the ESS will operate at full potential. This paper presents the key detector requirements for three of the Time-of-Flight (TOF) diffraction instrument concepts selected by the Scientific Advisory Committee to advance into the phase of preliminary engineering design. We discuss the detector technologies commonly employed at the existing similar instruments and their major challenges for ESS. The detector technologies selected by the instrument teams to collect the diffraction patterns are also presented. Analytical calculations, Monte-Carlo simulations, and real experimental data are used to develop a generic method to estimate the event rate in the diffraction detectors. We apply this method to make predictions for the future diffraction instruments, and thus provide additional information that can help the instrument teams with the optimisation of the detector designs.

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Section: The Heimdal Diffraction Detectorsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Neutron detectors for the ESS diffractometers

et al. 2017

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“…This means that pulse shape discrimination can be used to discriminate neutron signals from other signal types. Various pulse shape discrimination techniques include rise-time comparison [41], charge comparison algorithm [21], [22], [42], [43], digital filters [44]- [47], pulse gradient analysis [48], [49], frequency gradient analysis [50], [51], wavelet analysis [52]- [56], and artificial neural networks [57]- [60].…”

Section: Introductionmentioning

confidence: 99%

Real-Time Signal Processing for Mitigating SiPM Dark Noise Effects in a Scintillating Neutron Detector

Pritchard

Chabot

Robucci

et al. 2021

IEEE Trans. Nucl. Sci.

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A 6 LiF:ZnS(Ag) based cold neutron detector with wavelength shifting (WLS) fibers and SiPM photodetector was developed at the NIST Center for Neutron Research. For neutron scattering applications at the NCNR, detector false positives severely diminish the quality of very faint neutron scatter patterns. Thermal noise generated by the SiPM significantly increases the likelihood of false positives by the detector/discriminator. This paper describes and evaluates a digital real-time algorithm implemented on a field programmable gate array (FPGA) which quickly differentiates SiPM thermal noise and noise pulse pile-up from neutron signals. The algorithm reduces deadtime spent on examining noise pulses as well as reduces the number of false positives.

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“…Over the past decade photodetector technologies have seen a shift from the use of classical PMTs to solid-state devices such as silicon photomultipliers (SiPMs), which are robust, compact and electronically stable instruments [10]. The coupling of a ZnS: 6 LiF scintillator with a SiPM has been already tested by the Detector group of the Laboratory for Particle Physics (LTP) at PSI, Switzerland, in the framework of the upgrade of a neutron diffractometer [11], [12]. Although this detection system was not developed for in-core reactor applications, an adapted version of the latter would represent an efficient solution to perform highlyresolved experiments in research reactors and to engineer advanced non-invasive reactor diagnostic techniques [13].…”

Section: Introductionmentioning

confidence: 99%

Developing and testing a miniature fiber-coupled scintillator for in-core neutron counting in CROCUS

et al. 2020

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An advanced neutron detection system for highly localized measurements in nuclear reactor cores was developed and tested in the Laboratory for Reactor Physics and System Behaviour (LRS) at the École polytechnique fédérale de Lausanne (EPFL), Switzerland, in close collaboration with the Detector group of the Laboratory for Particle Physics (LTP) at the Paul Scherrer Institute (PSI), Switzerland. The miniature-size detector is based on the coupling of a ZnS:6LiF scintillator/converter screen of 1 mm2 and 0.2 mm thickness with a 10-m optical fiber, the latter being connected to a silicon photomultiplier (SiPM). In this development version, the output signal is processed via analog read-out electronics. The present work documents the characterization of a detection system prototype in the mixedradiation fields o f t he C ARROUSEL f acility a nd i ts t esting in the CROCUS zero-power reactor operated at LRS. The fibercoupled scintillator shows a linear response with the reactor power increase up to 6.5 W (i.e. around 108 cm-2s-1 total neutron flux), with a s ubsequent l oss o f l inearity d ue t o e lectronic dead time of the analog system. Nevertheless, the detector shows excellent neutron counting capabilities whether compared to other localized detection systems available at LRS, e.g. miniature fission chambers and an sCVD diamond detector.

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A 16-ch module for thermal neutron detection using ZnS:6LiF scintillator with embedded WLS fibers coupled to SiPMs and its dedicated readout electronics

Cited by 15 publications

References 5 publications

Neutron detectors for the ESS diffractometers

Neutron detectors for the ESS diffractometers

Real-Time Signal Processing for Mitigating SiPM Dark Noise Effects in a Scintillating Neutron Detector

Developing and testing a miniature fiber-coupled scintillator for in-core neutron counting in CROCUS

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